Grinding and polishing machine.



F. R. PATCH.

GRINDING AND POLISHING MACHINE.

APPLICATION FILED SEPT. 22, 1915.

Patented July 10, 1917.

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GRINDING AND POLISHING MACHINE.

APPLICATION FILED SEPT.22. I915. I ,3, I Patented July 10, 1917.

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GRINDING AND POLISHING MACHKNE.

APPLiCATlON FILED SEPT. 22. I915.

Patented July 10, 1917.

3 SHEE T8SHEET 3.

carriage can be driven at the desired speed.

GRINDING AND POLISHING MACHINE.

Application filed September 22, 1915.

land, in the county of Rutland and State of.

Vermont, have invented certain new and useful Improvements in Grinding and Polishing Machines, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to certain new and useful improvements in grinding and polishing machines for grinding stone and the like, the object being to provide a machine in which the polishing heads thereof are given a combined rotary planetary and slidmg movement whereby the stone being ground or polished is given a higher polish in a shorter time.

Another object of my invention is to provide a grinding and polishing machine in which a movable carriage employed having means for propelling the same over the stone to be ground or polished, said carriage having rotary polishing heads which are also given a planetary movement.

Another object of my invention is to pro- -vide a polishing machine which is so constructed that a great advantage is obtained therebv over machines'of this character now in use, as I have found by experimenting that by mountin the revoluble polishing heads on a movable carriage, moving over a stationary platen, better results can be obtained than in machines which employ. a movable platen and a stationary carrier for the polishing heads.

Another and further object of my invention is to provide a machine which is driven by a series of electric motors, each motor operated independent of the others and under the control of an operator whereby the and the polishing heads rotated at any speed desired and adjusted in respect to the surface to be ground or polished. I

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

In the drawings Figure 1 is an end elevation of my improved grinding and polishing machine showing the polishing heads in contact with Specification of Letters Patent.

Patented July 10, 1917.

Serial No. 52,035.

the stone to be polished arranged on a stationary platen or bed, said stone being shown in section.

Fig. 2 is a top plan view of the machine.

Fig. 3 is a side elevation, and

Fig. 4 is a. detailed vertical section through one of the polishing head driving spindles showing the yielding connection for allowing the head to yield when brought into contact with an exceptionally rough surface.

Like numerals of reference refer to like parts in the several figures of the drawings.

In carrying out my invention I employ a suitable concrete foundation 1 which is provided with parallel enlargements 2 on which are arranged sleepers 3 having tracks 4 secured thereon and on which is mounted a movable carriage 5 which comprisesa pair of wheeled trucks 6 and 7 having rear driving wheels 8 carried by axles 9 which are provided with beveled gears 10 meshing with beveled pinions 11 carried by drive shafts 12 which are driven from a suitable motor, as will be hereinafter fully described.

The trucks 6 and 7 are connected together by a frame 13 adapted to span a centrally arranged bed or platen 14, said frame being provided with guide-ways 15 in which are mounted the ends of a cross beam 16, as clearly shown in Figs. 1 and 3, said cross.

beam being slidably mounted therein so that the same can be raised and lowered as will be later described.

The frame 13 is provided with a platform 17 on which is mounted an electric motor 18 carrying a drive pinion 19 meshing with a gear 20 secured on a trai'isversely arranged shaft 21, said shaft being provided with worms 2) at its ends which mesh with worm gears 23 carried by screw shafts 24 which extend through suitably threaded boxes,16, carried by the ends of the cross beam and by means of which the cross beam is raised and lowered within its guideway.

In order to provide means for driving the carriage on the rails I provide the upper ends of the drive shafts 12 with worm gears 25 which mesh with the worms 26 secured on a cross shaft 27 which is provided with a gear 28 meshing with the pinion 29 secured on the motor shaft of an electricxmotor 30, as clearly shown in Fig. 2.

Mounted on' an extension of the platform 17 is a motor 31, the shaft of which is provided with a pinion 32 which meshes with a gear 33 carried by a shaft- 34 which is provided with a pinion 35 which in turn meshes with a gear 36 carried by a shaft 37, said shaft being provided with a beveled pinion 38 at the opposite end, which meshes with a beveled gear 39 feathered on a vertical driving shaft 40 in order to allow the shaft to move up and down through the beveled gear 39 for the purpose hereinafter fully described.

The lower end of the shaft 40 is mounted with a bearing 41 extending laterally from the cross beam 16, and has connected thereto a circular head 43 which is provided with a series of peripheral bearings 44 herein shown four in number, said bearings carrying vertical spindles 45 provided with knuckles 46 at their lower ends, which are connected to grinding heads 47. All of these spindles are identically alike, and the description of one will be suflicient for all. The lower ends of the bearings 44 terminate in hood portions 48 into which extend cups 49 carried by the spindles and in which is arranged a coil spring 50, one end of the same bearing against the bottom of the cup and the other end bearing against the end of the bearing so as to allow the spindle to move vertically against the tension of the spring whereby the same is allowed to yield, if the same is subjected to any irregularities in the rough stone.

Secured to the under side of the cross beam 16 is a gear 51, said gear being preferably secured to said beam by bolts and sleeves as shown in Fig. 1 of the drawin in order that the same will be firmly held stationary. Feathered on the upper end of each of the spindles 45 is a gear 52 which meshes with the gear 51 in such a manner that the spindle is given a rotary movement when the shaft 40 is rotated and at the same time the grinding disks are given a planetary movement, as the head 43 carried by the shaft 40 rotates around the gear 51 and as the carriage is moved each grinding disk is given a combined rotary planetary and sliding movement so as to polish or grind the stone.

A suitable hood is preferably arranged over the gear 51 and gears 52, and it is, of course, understood that the polishing disks are supplied with water in the ordinary manner.

The motors 18, 30 and 31 are controlled from a controller 54 arranged adjacent an operators platform 55 extending outwardly from the carriage as clearly shown in Figs. 2 and 3, and while the wiring connecting the motors to the controller are not shown, the controller is so formed and connected to the motors that the operator can start ably supporte of the stone, the operator through the medium of the controller lowers the cross beam until the polishing disks carried by the heads are brought into engagement with the face of the stone and by starting the motor controlling the drive shafts of the carriage and the motor operating the central drive shaft, the polishing heads'will move over the stone and at the same time they are each giving a rotary movement and a planetary movement which has been found in practice to accomplish the polishing of stone or the like in a very short time and with better results than with machines employing a movable platen for the stone.

What is claimed 1s:

1. In a stone grinding and polishing machine, the combination with a self-propelled 5 carriage adapted to be moved back and forth over the stone to be polished, of a revoluble head carried by said carriage, a fixed gear, and a series of spindles carrying grinding disks mounted upon said head, provided with gears meshing with the fixed gear for imparting to said grinding disk :1 combined rotary and planetary movement. 2. A grinding and polishing machine, having a movably mounted carriage adapted to be moved back and forth over the surface to be polished. a series of polishing heads carried by said carriage, means for imparting to said heads a combined rotary, and planetary movement whereby said headsihave a combined rotary, 1.)lanetar v and rectilinear movement over the surface to be polished.

3. In a ston grinding and polishing machine, the combination with a self-propelled carriage, of a cross beam adjustably mounted in said carriage, a revoluble head carried by said carriage, a fixed gear carried by said cross beam, a series of spindles carried by said head, gears carried by said spindles meshing with the fixed gear, and polishing heads carried by said spindles having a combined rotary, planetary and rectilinear movement.

4. In a stone polishing machine, the combination with a self-propelled carriage, adapted to be moved back and forth over the stone to be )olished, of a series of yieldl polishing heads carried thereby, means for giving said polishing riage, means for adjusting said cross beam,

a gear fixed to said cross beam, a rotary head carried by said carriage, a series of yieldably mounted spindles carried by said head, pinions fixed on said spindles meshing with said gear, polishing heads carried by the lower ends of said spindles and means for rotating said head to impart a combined rotary and planetary movement into said heads.

6. A stone polishing and grinding machine comprismg a pair of tracks, a frame connecting said trucks, a platform mounted upon said frame, a motor mounted upon said platform, a driving connection between said motor and wheels of said trucks, a beam slidably mounted in said frame, screws for adjusting said beam, a motor having a driving connection with said screws, a revoluble shaft, a motor having a driving connection with said shaft, a head carried by said shaft, a gear fixed to said beam, a series of spindles revolubly mounted in said head, pinions carried by said spindles meshing with said gear, polishing heads carried by the lower ends of said spindles, and a controller for controlling said motors independently.

7. In a stone grinding and polishing machine, the combination with a self-propelled carriage, of a beam slidably mounted in said carriage, a shaft revolubly mounted in said beam, a gear feathered upon said shaft, a driving pinion meshing with said gear, av head carried by the lower end of said shaft, a series of yieldably mounted spindles carried by said head, pinions carried by said spindles meshing with the gear of the cross beam, olishing heads carried by the lower ends of said spindles, and means for adjusting said beam.

8. In a stone grinding and polishing machine, the combination with a self-propelled carriage, of a stationary platen, of a cross beam adjustably mounted in said carriage, a revoluble head carried by said beam, a series of spindles carried by said head, a gear fixed to said beam, pinions mounted on said spindles meshing with said gear,

polishing heads carried by the lower ends of said spindles, and independent means for revolving said head and adjusting said cross beam.

9. In a stone polishing and grinding machine the combination with a. self propelled carriage, of a stationary platen, a beam spanning said platen adjustably mounted on said carriage, a revoluble head, a series of saindles carried by said head, polishing hea s carried by said spindles, pinions fixed on the upper ends of said spindles, a gear fixed to said cross beam meshing with said pinions, and. means for revolving said head to cause said polishing heads to have a rotary and planetary movement.

10. In a stone polishing and grinding machine, the combination with a self-propelled carriage, of a revoluble head carried by said carriage, a fixed gear, a series of spindles carried by said head provided with pinions meshing withthe fixed gear, grinding heads carried by said spindles, and means for rotating said head to cause said spindles to rotat and move around said fixed gear, whereby a. combined rotary, planetary and rectilinear movement is imparted to said grinding heads.

11. In a stone polishing and grinding machine, the combination with a stationary platen, of a reciprocating carriage adapted to be moved back and forth over the stone to be polished arranged on said platen, a series of grinding heads carried by said carriage, means for imparting to said heads, a combined rotary and planetary movement whereby said heads have a rotary, planetary and rectilinear movement over the stone to be polished.

12. A stone polishing and grinding machine comprising a self-propelled carriage, an adjustable beam carried by said carriage, a revoluble shaft mounted in said beam, a head carried by said shaft, a gear fixed to said beam, a series of yieldably mounted spindles carried by said head, pinions fixed on said spindles meshing with said gear, and grinding heads pivotally supported by the lower ends of said spindles.

In testimony whereof I hereunto allix my signature in the presence of two witnesses. I FRED R. PATCH.

Witnesses:

AGNES E. GILSON, RUTH A. FULLER. 

